As it turns out there are other citizens of this world, not just the botclient.
So I have properly labeled the payload with a type. This makes the web
front-end less breaky.

This was a problem before when the probe hit an object that was further than
another object first. Now we traverse all objects all the time to find the
closest one. \o/

I tried taking it down to 6, but it fails the tests consistently ...